Technology & Medicine › Digital age › The Internet (TCP/IP)
World Wide Web
proposed March 1989; public 1991 (Berners-Lee)· Invention or discovery· Communication & computing
Well documentedSolid records, physical evidence or scientific consensus.
The World Wide Web is the system of linked pages, addresses and browsers that runs on top of the Internet.
See it on the Technology & Medicine map →How it works
At CERN, the physics lab near Geneva, British scientist Tim Berners-Lee proposed in March 1989 a way to link documents across computers. By late 1990 he had written three basics still used today: HTML (the page format), URLs (addresses) and HTTP (the request rules), plus the first browser and server. The web went public in August 1991; CERN released it royalty-free in April 1993, and that year's Mosaic browser added images and drew crowds.
Why it mattered
It turned the Internet from a specialists' tool into a place anyone could publish, shop and look things up, creating trillion-dollar industries.
Think of it like
The Internet is the road network; the web is the street addresses and storefronts that made people want to drive on it.
How we know
Berners-Lee's 1989 proposal survives, with his boss Mike Sendall's note 'Vague but exciting'; CERN has restored the first website, info.cern.ch, and keeps the 1993 release document.
Connections (4)
▸Gutenberg's printing press is often compared with the World Wide WebMostly agreed
The connection
This is a comparison, not a direct line of descent. Gutenberg's press made copying text cheap and spread it beyond scribes and churches; the web made publishing nearly free and instant for anyone. Both brought floods of information, new industries, and fights over misinformation and control.
When and how
Mainz, about 1450, and CERN near Geneva, 1989–91; the comparison is common among historians and writers such as Clay Shirky.
How sure are we?
It is a parallel, not a causal link; its strength rests on similar patterns documented after each: rapid spread, cheaper information and social upheaval.
Debates and open questions
Whether the web's effects will prove as deep as print's, which helped fuel the Reformation and the scientific revolution, is a matter of interpretation.
▸The Internet (TCP/IP) carried the World Wide WebWell documented
The connection
The Internet is the network: TCP/IP rules that let any computer send data packets to any other. The web is a service running on top of it: pages linked by URLs and fetched with HTTP. Berners-Lee built on the Internet because it already linked universities and labs; without it, the web would have had no roads to travel.
When and how
The Internet switched to TCP/IP on January 1, 1983; Berners-Lee built the web at CERN, 1989–91, on computers that had just joined the Internet.
How we know
Berners-Lee's 1989 proposal and the HTTP specifications build directly on Internet protocols; he describes this in his 1999 memoir 'Weaving the Web'.
Debates and open questions
People often confuse the two; whether the Internet would have reached the public without the web, perhaps through rivals like Gopher, is speculation.
▸World Wide Web led to Social mediaWell documented
The connection
The web made publishing free, but early sites were mostly read-only pages. Around 2004, so-called 'Web 2.0' sites let ordinary users post, comment and connect with friends, helped by broadband and better browsers. Facebook, YouTube and Twitter began as websites; their ad-funded feeds of user content became the template for social media.
When and how
Six Degrees (1997) and Friendster (2002) as websites; Facebook at Harvard, 2004; YouTube in California, 2005; 'Web 2.0' popularized by Tim O'Reilly's 2004 conference.
How we know
Company histories and archived pages in the Internet Archive's Wayback Machine show social networks started as websites before moving to apps.
Debates and open questions
Some argue social media betrayed the web's open design by concentrating it in a few companies' platforms; Berners-Lee himself has made that criticism.
▸World Wide Web supplied the training data for Deep learning (modern AI)Mostly agreed
The connection
Deep learning needs enormous numbers of labeled examples, and the web supplied them. ImageNet gathered about 14 million web photos, labeled by online workers through Amazon Mechanical Turk; AlexNet's 2012 breakthrough was trained on it. Later language models learned from billions of web pages collected by crawls such as Common Crawl.
When and how
ImageNet built at Princeton and Stanford under Fei-Fei Li, 2007–09; Common Crawl, a nonprofit web archive, from 2008; used by AI labs worldwide.
How sure are we?
The ImageNet, AlexNet and GPT-3 papers state their data sources; GPT-3's paper lists filtered Common Crawl as the bulk of its training text.
Debates and open questions
Whether training AI on copyrighted web content is legal fair use is being fought in court, including suits by authors and The New York Times from 2023.